mixture setting

[barkingwilhelmina]

hi all, have spent the weekend replacing recon gearbox, again, then the gear linkage, again. my finger nails are black and my thumb nail blue and throbbing, still, after trapping it between the body and the gear linkage - ouch!  am happy now though as everything works as it should..... yay!

my question is, which way do you turn the mixture screw to make it rich.....? i set the mixture on my 500 a few years ago and followed the manual, clockwise until it faulters then counter clock until it faulters and then find the middle. is this correct.....? it worked at the time. when i do this on my 126, clockwise it starts to faulter and peter out, but counter clockwise it doesn't do anything......? im worried it might be lean hence my question.

great site by the way, have managed to do so many repairs myself thanks to the information within it. thanks, you've saved me a small fortune!

[Pete126]

Well done Tho your not supposed to damage yourself The idle mixture screw only adjusts the mixture when the engine is on idle, once the butterfly valve opens the main jet takes over, Assuming you haven't changed the main jet and air correction jet the mixture should be correct,
Adjustment is how you describe but i was taught to screw the mixture screw in until the engine hunts then screw it out slowly until the engine runs even to the point where the engine revs peak, If the idle speed is too high adjust the idle adjustment screw to bring it down. 

[barkingwilhelmina]

ahh, so the idle mixture makes no difference to running at speed...? the carb is a recon from poland off ebay. it seems to work well actually, am just getting a bit of pinking and have checked everything else.....?

[Pete126]

yeah it makes no difference once the throttles open, If the the engine is pinking its more than likely to be a problem with the points and/or timing.

[barkingwilhelmina]

you were spot on, timing too retarded. it's fitted with 123 electronic and i just followed the manual when i fitted it. turns out that the instructions are wrong and tell you to set it to the most retarded it can be..? i advanced it a fair amount and now it runs beautifully and starts hot! thanks for the advice.